About KYN28A-12

KYN28A-12 is a relatively common high-voltage switchgear at present, rated voltage is 3.6kV~12kV. The equipped vacuum circuit breaker is in the middle of the switch cabinet, that is, the circuit breaker is located in the middle of the front cabinet of the switchgear, so the lower space can be saved for the expansion of other schemes or used as a cable room.

Application Channels:

Mainly used in power plants, substations, transformation and distribution centers of industrial and mining enterprises, and large-scale high-voltage motor starting equipment, etc., for receiving and distributing electric energy, and for controlling, protecting and monitoring circuits.

KYN28A-12 Parameters

Item		Unit	Technical Parameter
Rated voltage		KV	12
Rated current		A	1250
Rated short-time power frequency withstand voltage (effective value)		KV	42
Rated lightning impulse withstand voltage (peak value)		KV	75
Rated short-circuit breaking current (effective value)		KA	31.5
Rated short-circuit making current (peak value)		KA	80
Rated thermal stability current (effective value)	Main circuit（4S)	KA	31.5
Rated thermal stability current (effective value)	Ground loop（4S)	KA	27.3
Rated dynamic stability current (peak value)	Main circuit	KA	80
Rated dynamic stability current (peak value)	Ground loop	KA	68.3

Strict Quality Control

1. Full-link intelligent detection technology
Real-time monitoring of key states: infrared temperature measurement technology, partial discharge monitoring, intelligent sensor network, three-level quality firewall,
100% spectral detection of raw materials, 20+ key points in the production process, 72 hours of full project experiment before leaving the factory.
2. Extreme environment reliability guarantee
30-year ultra-long protection commitment: using 316L stainless steel substrate + nano-ceramic coating, passing 3000 hours of salt spray/200 hot and cold cycle tests, high UV resistance level

R&D Advantages

TSTY currently has 600 employees and a technical R&D team of more than 200 people. It has established a science and technology innovation center to focus on material and process innovation and realize independent research and development of transformers; relying on the national CNAS certified laboratory, each product passes more than ten rigorous tests such as lightning strike and insulation no-load loss to ensure stable operation in the whole environment.